| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 47.3 | 82 |
| 2015 | 42.02 | 106 |
| 2014 | 38.39 | 110 |
| 2013 | 36.64 | 111 |
| 2012 | 30.2 | 126 |
| 2011 | 29.16 | 126 |
| 2010 | 29.88 | 127 |
| 2009 | 26.49 | 132 |
| 2008 | 23.18 | 139 |
| 2007 | 24.12 | 136 |
| 2006 | 20.3 | 142 |
| 2005 | 16.88 | 147 |
| 2004 | 15.62 | 150 |
| 2003 | 12.79 | 155 |
| 2002 | 11.94 | 155 |
| 2001 | 11.23 | 156 |
| 2000 | 10.38 | 156 |
| 1999 | 7.95 | 156 |
| 1998 | 7.44 | 156 |
| 1997 | 8.27 | 154 |
| 1996 | 6.82 | 154 |
| 1995 | 7.74 | 152 |